Ordering Recommendation

May assist in the evaluation of inherited or acquired disorders of mineral metabolism such as hypophosphatemia rickets, tumor-induced osteomalacia, and familial tumoral calcinosis with hyperphosphatemia.

Mnemonic

IFGF23

Methodology

Quantitative Chemiluminescent Immunoassay

Performed

Varies

Reported

3-10 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Serum Separator Tube (SST). Also acceptable: Plain red.

Specimen Preparation

Transfer 0.5 mL serum to an ARUP Standard Transport Tube. (Min: 0.25 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Frozen. Also acceptable: Refrigerated.

Unacceptable Conditions
Remarks
Stability

Ambient: Unacceptable; Refrigerated: 2 weeks; Frozen: 3 months

Reference Interval

By Report

Interpretive Data



Compliance Category

Note

Hotline History

N/A

CPT Codes

83520

Components

Component Test Code* Component Chart Name LOINC
3003817 Intact Fibroblast Growth Factor 23 54390-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Autosomal Dominant Hypophosphatemic Rickets
  • Familial Tumoral Calcinosis with Hyperphosphatemia
  • FGF23
  • Intact-FGF23
  • Oncogenic Osteomalacia
  • Phosphatonin
  • X-linked Hypophosphatemia
Intact Fibroblast Growth Factor 23 (FGF23), Serum

Mayo Clinic Laboratories